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1 J. S. CONNBLLY. GAS LIGHTING 0R EXTINGUISHING APFARATUS.

(No Model.)

Patented Aug. 25, 1896.

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JOHN S. OONNELLY, OF TITUSVILLE, PENNSYLVANIA, ASSIGNOR TO THEOONNELLY-CRITOHLOW COMPANY, OF SAME PLACE.

GAS LIGHTING OR EXTINGUISHING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 566,445, dated August25, 18196. Application tiled February 3, 1896. Serial No. 577,803. (N0model.)

To all whom t may concern,.-

Be it known that 1, JOHN S. CoNNnLLY, of

Titusville, in the county of Crawford and` State of Pennsylvania, haveinvented a new and useful Improvement in Gas Lighting or ExtinguishingApparatus, of which the following is a full, clear, and exactdescription,

reference being had to the accompanying drawings, forming part of thisspecication, in which- Figure 1 shows in side elevation a streetlamp towhich my improved apparatus is applied. Fig. 2 shows in vertical sectionand on a larger scale the construction of the apparatus.

The object of my invention is to provide means for lighting andextinguishing gasburners from a central point, e. g. at the centralgas-works of a city. It is especially designed for use in connectionwith street-lamps, and when so applied it enables all the lamps of acity which are equipped with my invention to be lighted in the eveningand put out in the morning without need for a workman to go the round ofthe lamps, as has heretofore been the custom. The invention isapplicable, however, not only to use with street-lamps, but inconnection with any other burners where the lighting and extinguishingof the ilaem from a distant point is desirable,and although I illustratethe invention as applied to burners of the well-known Welsbach type itmay be used in connection with burners of any other construction.

The principle of operation of my improved device is that in connectionwith the main gas-burner I use a supplemental constantlylighted gassupply or jet, (which may be separate from but adjacent to the main jetor may lead into the burner proper,) and I control the main supply ofgas to the burner by means of a valve controlled by an automatic cutoff,operated by the pressure of the gas in the supply-pipe, and soconstructed that when subjected to the greater pressure commonlyemployed in city mains at night the valve will open and admit gas to theburner, but when the pressure is reduced, as is the custom during thedaytime, the valve will close, so as to cut oft the supply of gas to theburner, permitting, however, its iiow to the supplemental jet, whichremains constantly burning.

In the drawings, 2 represents a gas-supply pipe, which in the case ofstreet-lights is frequently inclosed in a hollow post. line of thispipe, preferably at the top of the post, I place the case 3 of a cut-outdevice, having a chamber 4, communicating directly with the pipe 2, achamber 5 being connected v therewith by a port 6, and having a valve 7,

which controls said port and which is connected to a cupiioat 8, situatein a chamber 9, its lower edge being immersed in mercury contained in acircular groove 10.

B is an air-vent in the chamber 9 above the diaphragm to permit freemotion of the latter. A passage or pipe 11 leads from the chamber 4: tothe chamber below the cuploat, a passage 12 leads from the chamber 5 inthe wall of the case 3 to the burner-supply passage 13, and a by-pass 14leads from the pipe 2 or chamber lin the wall of said case to thepassage 13. A screw-plug or valve 15 in the by-pass enables the size ofits opening to be regulated, so as to permit the passage of any desiredvolume of gas.

The operation is as follows The passage 11, connecting the chambers 4.and S, makes the gas-pressure on the under side of the float alwaysequal to the pressure in the supplypipe 2. The float is weighted so thatthe day pressure of gas shall be insuflicient to raise it and to unseatthe valve, but so that the increase of pressure in the pipe at nightshall be sufficient to raise the float somewhat and to open the port 6.During the day hours the valve 7` is closed, but the gas from the pipe 2passes through the by-pass 14 to the burner and burns there in a smalljet, its size being adjusted once for all by proper setting of the screworV valve 15. When the pressure in the main is raised to a degreesufficient to move the iioat, as will ordinarily happen at night and ata certain hour, the valve will be unseated and the gas will pass throughthe port 6 and passage 12 to the burner, causing the light to burn withits full brilliancy. This will continue until morning, when the pressurein the main is reduced, and then the dropping of the float will seat thevalve, cut off the iiow of gas through the port 6, and

In the IOO lia

will permit only the small jet of gas from the by-pass to burn at theburner. The motion of the valve is very short and the device is sosimple in its construction that it is not liable to get out of order andcan be cheaply applied With great saving to gas-lighting plants.

By the construction above described I secure a device which can be madevery cheaply in small and compact form and applied conveniently toordinary street-lamps, duc., by interposing,` it directly in the line ofthe gaspipe, which, as shown in the drawings, enters the case at thebottom and passes therefrom to the burner at the top. Such compactnessis due to the construction of the gas-passages 12 and 14 along,` or inthe sides of the case and to the employment of a cup-iioat sealed byimmersion in a body of mercury.

I claim- 1. The combination With a gas-burner and its gas-supply pipe,of a cut-off apparatus interposed in the pipe and comprising a casehaving a by-pass and a main burner-passage leading Within the case alongits Walls, a valve controlling the main burner-passage, and an invertedcup-float contained Within the case and dipping Within a body of liquid,said iioat being connected With the valve, and the chamber on its underside communicating with the main burner-passage, whereby the valve Willbe opened when the gas-pressure reaches a certain point of elevation andwill be closed When the pressure is reduced.

2. The combination With a gas-burner and its gassupply pipe, of acut-off apparatus interposed in the pipe and comprising a case .having aby-pass and a main burner-passage,

JOHN S. CONNELLY.

Titnesses z THOMAS W. BAKEWELL, G. I. HoLDsHIP.

